I'm trying to write/edit/delete files from an NTFS (Windows) partition from Puppy, but I keep getting denied!

By default, all partitions are mounted through the mount binary, which in turn, will only mount NTFS partitions as read-only. To get around this, first unmount (umount) the target ntfs partition, then use ntfsmount to mount it. Ntfsmount uses similar syntax to mount, therefore, ntfsmount /dev/sda1 /mnt/sda1 will successfully mount the first partition on drive sda to said sda1 folder.